There is a chance that that it might, sure.. but just because they have kernel support for the processor and a toolchain that can generate code, does not mean it's a supported device.

Boostrapping as an example, unlike an x86.. this device might have a proprietary mechanism for whatever NEC supplied operating system is preloaded, so the developers may have discover a way to execute their boot code and load the kernel.

What about output? a driver for the LCD? if no LCD, they would need a way of displaying output.. a serial port maybe, this could require disassemling the device to gain access to the pins.

It's not enough to support the processor, even with the BSD's attempt at "generic" ARM targets (armish/evbarm/etc).. some device specific code is almost always required.